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Vortec Heads??

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by Itali83, Oct 18, 2001.

  1. Itali83

    Itali83 1/2 ton status

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    Will Vortec heads off a 96 350 bolt right up to my 87 TBI motor?? I know about the valve train being different, and the intake being different, But I want to know if they will bolt up to the block. Are the water passages the same?? stuff like that. Thanks for you help!!!
    Ben 87 Jimmy
     
  2. Blazer_Boy

    Blazer_Boy 1/2 ton status

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    Yes and no. All the passages will fit but it won't bolt right up, you can..

    a)Drill new bolts holes in the head and use your old intake

    b)spend the $200 and buy a GM intake designed for TBI w/vortec heads. You'll need an exhaust manifold off of a Vortec truck because it has a little tube that runs to the intake that helps to atomize fuel. I suppose you could by-pass that but GM has a footnote in their book with that intake manifold saying you should run that tube.

    <a target="_blank" href=http://www.geocities.com/bigkern76>http://www.geocities.com/bigkern76</a>
     
  3. Itali83

    Itali83 1/2 ton status

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    Thanks man, anymore info on the vortec heads would be apreciated. How much power are they supposed to gain over stock TBI heads?? What are the valve sizes?? Combustion chamber size?? stuff like that. Thank you guys and the more info the better!!!!
    Ben 87 Jimmy
     
  4. Blazer_Boy

    Blazer_Boy 1/2 ton status

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    Oh, jeez, all the stuff I don't know. Well I did a little searching and I think this should answer everything except power gains.

    http://www.geocities.com/bigkern76
     
  5. Itali83

    Itali83 1/2 ton status

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    Ok thanks man.
     
  6. Mr.Chevy4x4

    Mr.Chevy4x4 1/2 ton status

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    I have seen 40 hp on a stock TBI with no other changes. If you are willing to change the cam you can gain 20-30 more.

    Oh yeah, 64cc combustion chamber and 1.94 and 1.50 valves. You have to run the self aligning rocker arms.

    '85 K5 : Run it til it breaks, then fix it and go again!<P ID="edit"><FONT class="small">Edited by Mr.Chevy4x4 on 10/18/01 07:43 PM.</FONT></P>
     
  7. Itali83

    Itali83 1/2 ton status

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    Thanks, I have a lead on a pair of 96 fully dressed heads. I will do a cam along with it, and headers. so I'm looking at quite a bit of power, I'm liking this!!
    Ben 87 jimmy
     
  8. Pure Insanity

    Pure Insanity 1/2 ton status

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    I dont think 96 are Vortecs. I think they started in 97. I may be wrong tho. If they are Vortecs, they will only have 4 intake bolt holes per head, 2 in front 2 in the rear NONE in the middle, and they will be straight up, when mounted on the block. They do not come out of the head at 90 deg. like all the others. They also have no EGR.

    Like I said I am not sure about the year. Mine are 97.

    If ya can't stop.......Smile as you go under! [​IMG]
     
  9. 55Willy

    55Willy 3/4 ton status

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    1996 was the first year, it was the L31 engine code. And yes it is a 40 horse gain over stock TBI heads.
    As far as the intake question, you will have to get a GM TBI conversion intake which is like $200 [​IMG]


    <font color=red>Life is like a mud hole:</font color=red><font color=blue>
    When the S#!T gets deep, you have to keep moving and friends can always pull you out</font color=blue>
    55 Willy's
     
  10. Pure Insanity

    Pure Insanity 1/2 ton status

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    OK so it was 96. OOPS! I said I wasnt sure. LOL! I used an Edelbrock RPM intake and went w/ a carb myself.

    If ya can't stop.......Smile as you go under! [​IMG]
     
  11. 55Willy

    55Willy 3/4 ton status

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    Thats the way I'm gonna go, but with the new air gap intake.

    <font color=red>Life is like a mud hole:</font color=red><font color=blue>
    When the S#!T gets deep, you have to keep moving and friends can always pull you out</font color=blue>
    55 Willy's
     
  12. Triaged

    Triaged 1/2 ton status

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    Do they make a Air Gap intake for Vortec heads now. Last time I checked (a while ago) they didn't...that is one of the things I have been waiting for.

    '71 Blazer CST w/ a 400sbc, 4" lift, 36" Supper Swampers, and alot of rust
    <a target="_blank" href=http://community.webshots.com/user/triaged>See it Here </a>
     
  13. 55Willy

    55Willy 3/4 ton status

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    It was in the latest Scummit or Jugs I recieved..don't remember which.....let me look...
    Jugs(Jegs) 350-7516 SBC vortec $209.99 or polished # 350-75161 $319.99

    <font color=red>Life is like a mud hole:</font color=red><font color=blue>
    When the S#!T gets deep, you have to keep moving and friends can always pull you out</font color=blue>
    55 Willy's
     
  14. Triaged

    Triaged 1/2 ton status

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    Thanks...looks like one more thing to add to the "gota have" list.

    '71 Blazer CST w/ a 400sbc, 4" lift, 36" Supper Swampers, and alot of rust
    <a target="_blank" href=http://community.webshots.com/user/triaged>See it Here </a>
     
  15. HarryH3

    HarryH3 1 ton status Author

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    Make sure you get those '96 heads for dirt cheap, if they're used. A brand new pair only costs around $450. Here's a complete setup, heads, gaskets, bolts, intake, etc. for $680: <a target="_blank" href=http://www.sdpc2000.com/cart.asp?action=prod_detail&amp;catid=277&amp;pid=1120>http://www.sdpc2000.com/cart.asp?action=prod_detail&amp;catid=277&amp;pid=1120</a>

    <font color=black>HarryH3 - '75 K5</font color=black>
    <a target="_blank" href=http://www.angelfire.com/super/ThunderTruck>www.angelfire.com/super/ThunderTruck</a>
    It's a great day to be alive...
     
  16. Itali83

    Itali83 1/2 ton status

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    What wouldyou consider to be dirt cheap for a set of fully dressed heads?? they are used. I think they only have arounf 60k on them. This is stil in the idea stage, I'vemade contact and are both interested, I'm just waiting on all of the final info. They did ask what I was looking to pay and I owuld like to know what you guys think would be a fair price for them. Thanks for all of the help.

    Also, the TBI vortec intake is available right at GM correct?? And it is around 200 bucks?? Thanks again and I'll keep you all posted on whats going on.
    Ben 87 Jimmy
    <font color=blue>RUst=Bad</font color=blue>
    <a target="_blank" href=http://www.bens87toy.alloffroad.com>www.bens87toy.alloffroad.com</a>
     
  17. Itali83

    Itali83 1/2 ton status

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    Also, pureinsanity said that the heads don't have any EGR?? is that right, it must have an egr or be egr compatible with the TBI to vortec head intake. I just want to make sure everything will work out so I'll have a smoking deal on some heads and a lot more powerful truck at the end [​IMG] Thanks again and keep it coming!!!!!!!!!!!!
    Ben 87 Jimmy
     
  18. HarryH3

    HarryH3 1 ton status Author

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    I wouldn't pay more than $200 for a set with that many miles. The brandy new ones are just too cheap!

    The TBI intake for Vortec heads costs $309 from Scoggins-Dickey. [​IMG] <a target="_blank" href=http://www.sdpc200.com>www.sdpc200.com</a>

    You'll probably also need a custom computer chip to let the computer know that the engine now needs much more fuel to keep up with the extra air flow. [​IMG]

    <font color=black>HarryH3 - '75 K5</font color=black>
    <a target="_blank" href=http://www.angelfire.com/super/ThunderTruck>www.angelfire.com/super/ThunderTruck</a>
    It's a great day to be alive...
     
  19. Ddragggon

    Ddragggon 1/2 ton status

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    question: will BBC vortec heads fit on my 73 454? I've been contemplating a swap on my `new' 454 I have, just to see if they'd be happier. I figgure the intake will have to be something besides the stock one, or have the holes reamed out a little to fit the off-angle bolts. any idea on the chaber size/compression ratio? or how it compares to my stock 73 10.25:1 ratio? ( they used to sell 454's with a 10.25:1 ratio, as thier standard engine. ) and finaly, any idea what they might cost new/used?

    thankyou in advance, ( at worst, I'll call my local chevy dealer, and demand answers from them)

    -Rich

    My truck isn't ugly, you have a skewed sense of beauty

    <font color=blue>2007 Ford XLS++ intrepid Ram Superduty 7000 R-type's suck</font color=blue>
     
  20. HarryH3

    HarryH3 1 ton status Author

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    No idea on big blocks. I don't have one of those to play with. [​IMG] Shawn may have an idea or two on this. [​IMG]

    <font color=black>HarryH3 - '75 K5</font color=black>
    <a target="_blank" href=http://www.angelfire.com/super/ThunderTruck>www.angelfire.com/super/ThunderTruck</a>
    It's a great day to be alive...
     

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